Who is Sagar Adani, accused of bribery and fraud charges along with Gautam Adani in the US?

US prosecutors have accused Sagar Adani, nephew of Indian billionaire Gautam Adani, and others of orchestrating a massive bribery scheme. They allegedly paid over $250 million to Indian officials to secure lucrative solar energy contracts. Arrest warrants have been issued, and the Adani Group's stocks and bonds have plummeted.